Seasonal Use Guidelines Of ECOPOD-N™ Fixed Film Wastewater Treatment System

These guidelines are for conditions as outlined below and apply for systems that are not in use for periods of time indicated. Site conditions not covered by the following must be forwarded to Delta Environmental Products™ for recommended guidelines to meet the particular site conditions.

1

.

System not in use for more than one month and less than three months. Electrical power is left on and there are no frost conditions.

•

Leave air pump on and system running.

2.

System is not in use for more than three months. Electrical power is turned off and there are not frost conditions.

•

Remove all materials and liquid from tank.

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Refill with clean water.

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Turn off air pump.

3.

System is not in use for more than three months. Electrical power is on and there are no frost conditions.

•

Leave air pump on and system running; OR

•

Remove all material and liquid from tank.

•

Refill with clean water.

•

Turn off air pump.

4.

System is not in use. Electrical power is turned off and there are frost conditions.

•

Remove all material and liquid from tank.

•

Turn off air pump.

•

If high ground water is present, fill with clean water.

•

If no ground water is present, leave tank empty.

UNDER NO CIRCUMSTaNCES SHOUlD THE aIR PUMP bE TURNED OFF FOR MORE THaN a FEW DaYS WITHOUT REMOVING TaNK CONTENTS.

Sample Requirements

An ECOPOD-N™ Fixed Film Wastewater Treatment System properly operated and maintained should provide the following effluent quality as determined through the analytical methods described in NSF/ANSI 245:

Biological Oxygen Demand 5 day average (BOD5) of less than 30 mg/1 (or ppm);

Samples must be taken in the effluent discharge line or an effluent pump or after the disinfection device. We recommend allowing the effluent to flow through the discharge pipe for a minimum of two minutes before taking the sample. This will allow any solids to be flushed out that might have accumulated in the discharge pipe. Please find attached drawings of a Sample Port.

SaMPlING SHOUlD bE TaKEN bY a lOCal CERTIFIED TESTING labORaTORY OR bY FOllOWING THEIR PROCEDURES. THE FOllOWING RECOMMENDED GUIDElINES MaY bE USED IF lOCal PROCEDURES aRE NOT aVaIlablE.

9

1.

biochemical Oxygen Demand (bOD) Samples for BOD analysis may degrade significantly during storage between collection and analysis, resulting in low BOD values. Minimize reduction of BOD by analyzing the sample promptly or by cooling it to near freezing temperature during storage. However, even at low temperature, keep the holding time to a minimum. Warm the chilled samples to 20° C before analysis; some storage time can be used to accomplish this conveniently.

a.

Grab Samples: If analysis is begun within two hours of collection, cooling is unnecessary. If analysis is not started within two hours of sample collection, keep sample at or below 4° C from the time of collection. Begin analysis within six hours of collection; when this is not possible because the sampling site is distant from the laboratory, store at or below 4° C and report length and temperature of storage to the Lab. In no case, start analysis more than 24 hours after grab sample collection. When samples are to be used for regulatory purposes, make every effort to deliver samples for analysis within six hours of collection.

2.

Total Suspended Solids (TSS) Use resistant-glass or plastic bottles, provided that the mate- rial in suspension does not adhere to container walls. Begin analysis as soon as possible, because of the impracticality of preserving the sample. Refrigerate sample at 4° C to mini- mize microbiological decomposition of solids.

3.

Phosphorous

If phosphorus forms are to be differentiated, filter samples immediately after collection. Preserve by freezing at or below

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10° C. Add 40 mg/HgCl2 /L to the samples, especially when

they are to be stored for long periods. Do not add either acid or 2CHCI3 as a preservative when phosphorus forms are to be determined. If total phosphorus alone is to be deter- mined, add 1 ml concentration HCL or freeze without any additions.

Do not store samples containing low concentrations of phos- phorus in plastic bottles unless kept in a frozen state because phosphates may be absorbed onto the walls of plastic bottles.

Rinse all glass containers with hot diluted HCL, then rinse several times in distilled water. Never use commercial deter- gents containing phosphate for cleaning glassware used in phosphate analysis.